EAN 2

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ISSN with an EAN-2 addon representing issue number 5.

The EAN-2 is a supplement to the EAN-13 and UPC-A barcodes. It is often used on magazines and periodicals to indicate an issue number.

Encoding[edit]

The Encoding of EAN-2 characters is very similar to that of the other European Article Numbers. The only difference is that the digits are separated by 01. The EAN-2 always begins with '01011.' Also, the R-Code is not used.

Encoding of the digits
Digit L-code G-code
0 0001101 0100111
1 0011001 0110011
2 0010011 0011011
3 0111101 0100001
4 0100011 0011101
5 0110001 0111001
6 0101111 0000101
7 0111011 0010001
8 0110111 0001001
9 0001011 0010111

The structure of the barcode is based on the value of the two digit to be encoded. The two digits treated as a single two-digit number is reduced modulo 4 and used to find the parity pattern to be used. The parity pattern repeats every 4 values.

EAN-2 Parity
Data to encode Parity pattern
00 LL Encode as 0 from L table followed by 0 from L table
01 LG Encode as 0 from L table followed by 1 from G table
02 GL Encode as 0 from G table followed by 2 from L table
03 GG Encode as 0 from G table followed by 3 from G table
04 LL Encode as 0 from L table followed by 4 from L table
05 LG Encode as 0 from L table followed by 5 from G table
06 GL Encode as 0 from G table followed by 6 from L table
07 GG Encode as 0 from G table followed by 7 from G table
... ...
98 GL Encode as 9 from G table followed by 8 from L table
99 GG Encode as 9 from G table followed by 9 from G table
Example - encoding 53
Start 5 (L) Separator 3 (G)
01011 0110001 01 0100001

References[edit]

U.P.C. Symbol Specification Manual - Appendix D